72479450 has 12 divisors (see below), whose sum is σ = 134811870. Its totient is φ = 28991760.

The previous prime is 72479447. The next prime is 72479453. The reversal of 72479450 is 5497427.

It is an interprime number because it is at equal distance from previous prime (72479447) and next prime (72479453).

It can be written as a sum of positive squares in 3 ways, for example, as 66373609 + 6105841 = 8147^2 + 2471^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72479453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 724745 + ... + 724844.

Almost surely, 2^72479450 is an apocalyptic number.

72479450 is a deficient number, since it is larger than the sum of its proper divisors (62332420).

72479450 is a wasteful number, since it uses less digits than its factorization.

72479450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449601 (or 1449596 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 72479450 is about 8513.4863598881. The cubic root of 72479450 is about 416.9381448584.

The spelling of 72479450 in words is "seventy-two million, four hundred seventy-nine thousand, four hundred fifty".